The auction, powered by the eBay for Charity programme, will run from 28th June until 9th July 2018. It will be featured on Action for Children’s eBay page.

Each of the stamps was signed by the cast while filming the final season of the HBO series, which is due to air in 2019. The unique items are perfect for collectors and fans of the show, and their sale will raise awareness for a great cause at the same time.

Take a look at the cast posing with their signed stamp enlargements below:

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Credit: HBO / Royal Mail

Action for Children helps disadvantaged children across the UK through fostering or adoption by intervening early to stop neglect and abuse, by influencing policy, and by making life better for disabled children. The charity offers over 600 services and improves the lives of 370,000 children, teenagers, parents and carers every year.

Find out more information at actionforchildren.org.uk. Action for Children is Royal Mail’s new charity partner until 2020.